Angular2. How can I check if an observable is completed?

Question

In my page there is a button that generates a report. That report needs data that is loaded using a http call to a rest endpoint when the page is loaded, but I do not have a

Answer 1

Method

finally()

Invokes a specified action after the source observable sequence terminates gracefully or exceptionally.

https://github.com/Reactive-Extensions/RxJS/blob/master/doc/api/core/operators/finally.md